 
  Release Date
              Discontinued
      
            
      
            The RPM Swirl offers the great control, power and high revving performance of the original Ninja RPM plus a longer skid and harder backend reaction for better pin carry. By combining the tremendously successful, patented RPM Ninja core and double shell, with Reactathane II, AMF has created a ball that will perform well on a wide range of lane conditions.
Factory Finish
              Polished
          Reactathane II Coverstock
Type
              Pearl Reactive
          RPM Ninja Core
* Core specs are estimated based on similar equipment.
Core Type
              Symmetric
          16 pounds
15 pounds
RG
              2.520
          Diff
              0.025
          14 pounds
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Similar Balls
| Ball | Brand | Comparison Grade | Coverstock | Factory Finish | Core | RG | Diff | MB Diff | US/Overseas Release | Discontinued | |
|---|---|---|---|---|---|---|---|---|---|---|---|
|   | RPM Swirl |   | Reactathane IIPearl Reactive | Polished | RPM NinjaSymmetric | 2.520 | 0.025 | ||||
|   | RPM Ultra/C Pearl |   | A- | Reactathane III PearlPearl Reactive | Polished | Ceram-XSymmetric | 2.500 | 0.025 | |||
|   | Pearlized Red Wolf |   | A- | Mega Bite PearlPearl Reactive | Polished | Wolf (1990s)Symmetric | 2.550 | 0.020 | |||
|   | Fire Storm |   | B | Balanced Pearl Reactive UrethanePearl Reactive | Highly Polished | Multi-Density 2-PieceSymmetric | 2.550 | 0.030 | |||
|   | Gold Pearl Quake |   | B | Flexcel GiPearl Reactive | Polished | Quake 2-PieceSymmetric | 2.550 | 0.040 | |||
|   | Messenger Titanium |   | B | Messenger TitaniumPearl Reactive | Polished | MessengerSymmetric | 2.570 | 0.021 | |||
|   | X-Celerator |   | B | X-Celerator MulticolorPearl Reactive | Polished | X-CeleratorSymmetric | 2.520 | 0.043 | |||
|   | Sparkling Pearl |   | B | Up 1 PearlPearl Reactive | 3000 Abralon, Factory Polish | PrezzieSymmetric | 2.528 | 0.031 | |||
|   | XXXmas |   | B | USY 2 PearlPearl Reactive | 3000 Sanded | PrezzieSymmetric | 2.528 | 0.031 | |||
|   | Shield Pink Pearl |   | B | USY 2 PearlPearl Reactive | 3000 Polished | PrezzieSymmetric | 2.528 | 0.031 | |||
|   | Jerk Orange Pearl |   | B | USY 2 PearlPearl Reactive | 3000 Polished | PrezzieSymmetric | 2.528 | 0.031 | |||
|   | Blue Pulse |   | B | Super-Flex Pearl ResinPearl Reactive | Polished | Pulse 2-pieceSymmetric | 2.581 | 0.018 | |||
|   | X-Calibur Burgundy Pearl |   | B | Super-FlexPearl Reactive | Polished | X-CaliburSymmetric | 2.550 | 0.040 | |||
|   | X-Calibur Purple |   | B | X-Caliber PurplePearl Reactive | Polished | X-CaliburSymmetric | 2.550 | 0.040 | |||
|   | Silver Streak Pearl |   | B | Sure Grip PearlPearl Reactive | 1500 Polished | Silver Streak (Modified Rotary)Symmetric | 2.520 | 0.040 | |||
|   | Too Hot |   | B- | Curelyon PearlPearl Reactive | 1500 Polished | Modified 2-Piece DSymmetric | 2.540 | 0.035 | |||
|   | X-Calibur Green |   | B- | X-Caliber GreenPearl Reactive | Polished | X-CaliburSymmetric | 2.550 | 0.040 | |||
|   | Virus |   | B- | MicaTakPearl Reactive | Polished | VirusSymmetric | 2.505 | 0.044 | |||
|   | PBA 60 |   | B- | R2S PearlPearl Reactive | 1500 Polished | C3 Centripetal ControlSymmetric | 2.490 | 0.029 | |||
|   | Eraser Banshee |   | B- | MONSOON PearlPearl Reactive | 1500 Polished | Inverted Multi-Density Power MassSymmetric | 2.520 | 0.040 | |||
|   | Hot Rod |   | B- | Curelyon PearlPearl Reactive | 1500 Polished | Modified Inverted 2-pieceSymmetric | 2.560 | 0.033 | |||
|   | X-Calibur Legend |   | B- | MicaTakPearl Reactive | Polished | X-Calibur LegendSymmetric | 2.560 | 0.045 | |||
|   | Dr. Jekyll |   | C+ | Super FlexPearl Reactive | 2000 Polished | Dense PolymerSymmetric | 2.515 | 0.040 | |||
|   | Avalanche Slide |   | C+ | PowrKoil XDPearl Reactive | High Gloss | Teal Rhino Pro LightbulbSymmetric | 2.542 | 0.024 | |||
|   | RPM Ultra/C |   | C+ | Reactathane IIISolid Reactive | Matte | Ceram-XSymmetric | 2.500 | 0.025 |